This needs to be done because the server does not support qemu, and
NixOS requires qemu to use the runAsRoot feature for docker images.
Instead, create the required files as part of the entrypoint.
Fixes#6
This is an initial configuration to restore old services.
Obviously, vendoring everything in a tarball is pretty awful, and if I
ever wanted to open source this, that would be a problem.
I intend to create a proper derivation in time, but including mods is
difficult from some initial experimentation.